Use ctypes instead of PyOpenGL for QtWebEngine Nvidia workaround

Fixes #2821

CHANGELOG.asciidoc

@@ -28,6 +28,8 @@ Breaking changes
 - New dependency on ruamel.yaml; dropped PyYAML dependency.
 - The QtWebEngine backend is now used by default if available.
 - New config system which ignores the old config file.
+- The depedency on PyOpenGL (when using QtWebEngine) got removed. Note
+  that PyQt5.QtOpenGL is still a depdency.
 
 Major changes
 ~~~~~~~~~~~~~

README.asciidoc

@@ -118,7 +118,6 @@ The following software and libraries are required to run qutebrowser:
 * http://jinja.pocoo.org/[jinja2]
 * http://pygments.org/[pygments]
 * http://pyyaml.org/wiki/PyYAML[PyYAML]
-* http://pyopengl.sourceforge.net/[PyOpenGL] when using QtWebEngine
 
 The following libraries are optional:
 

qutebrowser/browser/webengine/webenginesettings.py

@@ -28,6 +28,9 @@
 """
 
 import os
+import sys
+import ctypes
+import ctypes.util
 
 from PyQt5.QtGui import QFont
 from PyQt5.QtWebEngineWidgets import (QWebEngineSettings, QWebEngineProfile,
@@ -199,6 +202,11 @@ def init(args):
     if args.enable_webengine_inspector:
         os.environ['QTWEBENGINE_REMOTE_DEBUGGING'] = str(utils.random_port())
 
+    # WORKAROUND for
+    # https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/941826
+    if sys.platform == 'linux':
+        ctypes.CDLL(ctypes.util.find_library("GL"), mode=ctypes.RTLD_GLOBAL)
+
     _init_profiles()
 
     # We need to do this here as a WORKAROUND for

qutebrowser/misc/earlyinit.py

@@ -344,12 +344,6 @@ def check_libraries(backend):
         modules['PyQt5.QtWebEngineWidgets'] = _missing_str("QtWebEngine",
                                                            webengine=True)
         modules['PyQt5.QtOpenGL'] = _missing_str("PyQt5.QtOpenGL")
-        # Workaround for a black screen with some setups
-        # https://github.com/spyder-ide/spyder/issues/3226
-        if not os.environ.get('QUTE_NO_OPENGL_WORKAROUND'):
-            # Hide "No OpenGL_accelerate module loaded: ..." message
-            logging.getLogger('OpenGL.acceleratesupport').propagate = False
-            modules['OpenGL.GL'] = _missing_str("PyOpenGL")
     else:
         assert backend == 'webkit'
         modules['PyQt5.QtWebKit'] = _missing_str("PyQt5.QtWebKit")

qutebrowser/utils/version.py

@@ -186,7 +186,6 @@ def _module_versions():
         ('yaml', ['__version__']),
         ('cssutils', ['__version__']),
         ('typing', []),
-        ('OpenGL', ['__version__']),
         ('PyQt5.QtWebEngineWidgets', []),
         ('PyQt5.QtWebKitWidgets', []),
     ])

requirements.txt

@@ -7,4 +7,3 @@ MarkupSafe==1.0
 Pygments==2.2.0
 pyPEG2==2.15.2
 PyYAML==3.12
-PyOpenGL==3.1.0

tests/unit/utils/test_version.py

@@ -495,7 +495,6 @@ def __init__(self):
             ('yaml', True),
             ('cssutils', True),
             ('typing', True),
-            ('OpenGL', True),
             ('PyQt5.QtWebEngineWidgets', True),
             ('PyQt5.QtWebKitWidgets', True),
         ])